Later in December, the 3I/ATLAS interstellar comet will get as close to Earth as it ever will. Here's what to know.

Scientists using the Hubble Space Telescope have measured the size of a small exoplanet just 22 light years away, confirming that it’s the closest known Earth-sized world to our solar system to date.

Although astronomers have now discovered more than 5,000 exoplanets, or planets outside of the solar system, the large majority of these planets are considerably larger than Earth. That’s partly ...

The Hubble Space Telescope has captured imagery of the most distant single star found yet. It took the light from the star 12 ...

Using the Webb telescope’s powerful Near Infrared Imager and Slitless Spectrograph (NIRISS) instrument, the team detected a ...

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It’s not often that telescopes suspended in space have landmark birthdays like this one. Launched on April 24, 1990, NASA’s Hubble Space Telescope has orbited at about 320 miles above Earth’s surface, ...

NASA said Friday the Hubble Space Telescope has spotted a "spider galaxy" called UGC 5829 that's about 30 million light-years from Earth. Photo courtesy of NASA March 22 (UPI) --NASA said Friday the ...

above a vivid rusty landscape reveal Mars as a dynamic planet in this sharpest view ever obtained by an Earth-based telescope. NASA’s Earth-orbiting Hubble Space Telescope took the picture on June 26, ...